HClO2 exists only in aqueous solution. It decomposes rapidly in alkali to generate chlorite and chlorate ions, and rapidly decomposes in acid to generate chlorine dioxide, chlorate ions and chloride ions. There is some circumstantial evidence for bromic and iodic acids, but they are not even as stable as HCIO2.
Write the appropriate Lewis electronic point formula for (a) the chlorate ion, ClO3−; (b) chlorous acid, HClO2; (c) the nitrosyl ion, NO+.
The arrangement of atoms in ClO3− is
Calcium chlorite Ca(ClO2)2 has a molecular weight of 174.98 g/mol. Its density is 2.71 g/cm3. Its CAS number is 14674-72-7. Calcium chlorite can be produced by the reaction of chlorous acid and calcium carbonate:
In the case of fluorine, the only known oxyacid is HOF. Of the acids with the formula HXO2 (or more precisely, HOXO), only HClO2 is well characterized, and even for this acid only aqueous solutions are known. Therefore, the discussion will be limited to chlorous acid and its salts.
Chlorine exists in various oxidation states from -1 to +7 in aqueous solution . The chlorite ion/chlorite 1, chlorine in the +3 oxidation state, is in the middle of the series and can participate in redox processes as an oxidizing or reducing agent. Reacts with strong oxidants to produce chlorine dioxide and/or chlorate ions. Reduction of chlorite ions generally yields chloride ions as the major product.
Rav-Acha et al. Chlorate is attributed to the disproportionation of chlorous acid according to the equation. (2), which exists as the conjugate acid of chlorite (HClO2) under acidic conditions, pKa = 1.94 ).
Extraction and isolation of GGM for analytical purposes has traditionally been achieved by alkaline extraction of whole cellulose after delignification with chlorine (chlorous acid) or acid chlorite.